A method of data communication based on internetwork can make the User of radio LAN and the User of cable LAN interview cable WAN system resource first, if cable WAN system resource can be interviewed, or interview to radio WAN system resource through radio WAN network card module, and then to interview Internet resource indirectly, if cable WAN system resource can not be interviewed by using defined mobile bridge equipment, i.e both the user of radio LAN and the User of cable LAN can interview network data resource at most conditions. |